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If a train runs with the speed of 72km/h, it reaches its destination late by 15 minutes. However, if its speed is 90 km/h it is late by only 5 minutes. The correct time to cover its journey in minutes is :

Ratio of Sin i and Sin r is known as:

If each side of a cubiod is doubled, its surface are/यदि किसी घनाभ की प्रत्येक भुजा दुगुनी कर दी जाए, तो इसकी सतह का क्षेत्रफल

......... line shows the edges of the section plane in geometrical drawing.

The process of determining the elevations of points at short measured intervals along a fixed line such as centre line of railway, highway and canal etc. is known as:

हाल ही में भारत ने किस देश के साथ 4 बिलियन डॉलर के रक्षा सौदे को अंतिम रूप देने के लिए तैयार है?

The emissive power of a black body at 400 K is 1.0 × 10⁵ joule per sec per m² . Temperature of the black body at which its emissive power become 16.01 × 10⁵ joules per sec per m² is?

Which of the following is not a lung fish? निम्नांकित में से कौन एक फुफ्फूस मछली नहीं है-

पिता और पुत्र की वर्तमान आयु का योग 45 वर्ष है। 5 साल पहले, उनकी आयु का अनुपात 6 : 1 था। पिता की वर्तमान आयु ज्ञात कीजिए।